perihelions
Nearest solar points
Perihelions is the plural of perihelion, the point in an orbit around the sun where a planet, comet, or other body comes closest to it.
Earth reaches its perihelion in early January each year, when it's about 91 million miles from the sun.
The term pairs with aphelion, the farthest point from the sun.
The comet's perihelions occur roughly every 76 years.
Marks indicating omitted text
- orbitsCurved paths around bodies
- eccentricityUnconventional behavior or nature
- trajectoriesPaths of moving objects
- KeplerPlanetary motion law formulator
focal points · astronomical units · orbital mechanics · closest approach · perturbations · ephemeris · gravitational pull · planetary motion
Messenger god or planet
- VenusLove goddess, or planet
- EarthOur world
- MarsRed planet, war deity
- solar radiationEnergy emitted by sun
insolation · axial tilt · apsidal precession · relativistic effects · Einstein · gravitational waves · inner planets · conjunction
Astronomer's surname, comet fame
- tailsRear animal appendages
- comaUnwakeable unconsciousness
- outgassingReleasing trapped gas
- nucleusCentral controlling part
sublimation · brightness · visibility · solar wind · jets · sungrazer · apparition · Oort cloud
ellipses
Marks indicating omitted text
- orbitsCurved paths around bodies
- eccentricityUnconventional behavior or nature
- trajectoriesPaths of moving objects
Kepler · focal points · astronomical units · orbital mechanics · closest approach · perturbations · ephemeris · gravitational pull · planetary motion · inclination
Mercury
Messenger god or planet
solar radiation · insolation · axial tilt · apsidal precession · relativistic effects · Einstein · gravitational waves · inner planets · conjunction · opposition
Halley
Astronomer's surname, comet fame
- tailsRear animal appendages
- comaUnwakeable unconsciousness
- outgassingReleasing trapped gas
nucleus · sublimation · brightness · visibility · solar wind · jets · sungrazer · apparition · Oort cloud · Kuiper belt